Which application method is often applied to the point of runoff?

Which application method is often applied to the point of runoff?

• A. Spray application
• B. Granular application
• C. Soil injection
• D. Macroinfusion

Answer: (A)

The key idea here is how the form of pesticide delivery interacts with surface water flow. A spray application puts liquid pesticide onto foliar and exposed surfaces as a film or droplets. When rain or irrigation moves across that surface, the water can pick up the pesticide and carry it along with the runoff. This makes spray applications the one most commonly associated with the point of runoff, because the liquid residue is readily moved by surface water and can be deposited downstream or into water-containment areas. Granular formulations tend to stay on the soil surface longer and release more slowly, so they’re less prone to being carried away by short-term runoff. Soil injection places the product below the surface, and macroinfusion delivers material through the soil or irrigation system, both of which minimize surface runoff potential. So, for targeting surface pests in areas where runoff is a concern, spray applications are the method most likely to be used at or near the runoff path, despite the higher risk of movement with water.

The key idea here is how the form of pesticide delivery interacts with surface water flow. A spray application puts liquid pesticide onto foliar and exposed surfaces as a film or droplets. When rain or irrigation moves across that surface, the water can pick up the pesticide and carry it along with the runoff. This makes spray applications the one most commonly associated with the point of runoff, because the liquid residue is readily moved by surface water and can be deposited downstream or into water-containment areas.

Granular formulations tend to stay on the soil surface longer and release more slowly, so they’re less prone to being carried away by short-term runoff. Soil injection places the product below the surface, and macroinfusion delivers material through the soil or irrigation system, both of which minimize surface runoff potential. So, for targeting surface pests in areas where runoff is a concern, spray applications are the method most likely to be used at or near the runoff path, despite the higher risk of movement with water.